how to fix misfire in Ram 1500 DT (2019-Present) with P0301 code

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent any electrical shorts.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil from cylinder 1:
  • Unscrew the mounting bolts using a socket set.
  • Carefully pull the coil straight out to avoid damage.
• Remove the spark plug from cylinder 1:
  • Use a spark plug socket and ratchet to unscrew the spark plug.
• Inspect the spark plug:
  • Check for signs of wear, fouling, or damage.
• Replace with a new spark plug that meets OEM specifications:
  • Ensure proper gap settings as per manufacturer recommendations.
• Reinstall the spark plug and ignition coil.

3. Inspect and Replace Ignition Coil (if needed)

• If the ignition coil shows signs of wear or damage during inspection:
  • Replace it with a new OEM coil.
• Reconnect the ignition coil harness.

4. Check and Clean Fuel Injector

• Disconnect the fuel injector wiring harness:
  • Ensure the ignition is off before doing this.
• Remove the fuel injector from cylinder 1:
  • Unscrew any retaining clips and gently pull the injector out.
• Clean the injector using a fuel injector cleaner or replace it if it is faulty.
• Reinstall the fuel injector and reconnect the wiring harness.

5. Verify Repair

• Reconnect the negative battery terminal.
• Start the engine and let it reach operating temperature.
• Monitor for engine performance issues or check engine light.